[UDP]: Allow users to configure UDP-Lite.
[linux-2.6.git] / net / ipv4 / proc.c
1 /*
2  * INET         An implementation of the TCP/IP protocol suite for the LINUX
3  *              operating system.  INET is implemented using the  BSD Socket
4  *              interface as the means of communication with the user level.
5  *
6  *              This file implements the various access functions for the
7  *              PROC file system.  It is mainly used for debugging and
8  *              statistics.
9  *
10  * Version:     $Id: proc.c,v 1.45 2001/05/16 16:45:35 davem Exp $
11  *
12  * Authors:     Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
13  *              Gerald J. Heim, <heim@peanuts.informatik.uni-tuebingen.de>
14  *              Fred Baumgarten, <dc6iq@insu1.etec.uni-karlsruhe.de>
15  *              Erik Schoenfelder, <schoenfr@ibr.cs.tu-bs.de>
16  *
17  * Fixes:
18  *              Alan Cox        :       UDP sockets show the rxqueue/txqueue
19  *                                      using hint flag for the netinfo.
20  *      Pauline Middelink       :       identd support
21  *              Alan Cox        :       Make /proc safer.
22  *      Erik Schoenfelder       :       /proc/net/snmp
23  *              Alan Cox        :       Handle dead sockets properly.
24  *      Gerhard Koerting        :       Show both timers
25  *              Alan Cox        :       Allow inode to be NULL (kernel socket)
26  *      Andi Kleen              :       Add support for open_requests and
27  *                                      split functions for more readibility.
28  *      Andi Kleen              :       Add support for /proc/net/netstat
29  *      Arnaldo C. Melo         :       Convert to seq_file
30  *
31  *              This program is free software; you can redistribute it and/or
32  *              modify it under the terms of the GNU General Public License
33  *              as published by the Free Software Foundation; either version
34  *              2 of the License, or (at your option) any later version.
35  */
36 #include <linux/types.h>
37 #include <net/net_namespace.h>
38 #include <net/icmp.h>
39 #include <net/protocol.h>
40 #include <net/tcp.h>
41 #include <net/udp.h>
42 #include <net/udplite.h>
43 #include <linux/inetdevice.h>
44 #include <linux/proc_fs.h>
45 #include <linux/seq_file.h>
46 #include <net/sock.h>
47 #include <net/raw.h>
48
49 /*
50  *      Report socket allocation statistics [mea@utu.fi]
51  */
52 static int sockstat_seq_show(struct seq_file *seq, void *v)
53 {
54         socket_seq_show(seq);
55         seq_printf(seq, "TCP: inuse %d orphan %d tw %d alloc %d mem %d\n",
56                    sock_prot_inuse_get(&tcp_prot),
57                    atomic_read(&tcp_orphan_count),
58                    tcp_death_row.tw_count, atomic_read(&tcp_sockets_allocated),
59                    atomic_read(&tcp_memory_allocated));
60         seq_printf(seq, "UDP: inuse %d mem %d\n", sock_prot_inuse_get(&udp_prot),
61                    atomic_read(&udp_memory_allocated));
62 #ifdef CONFIG_IP_UDPLITE
63         seq_printf(seq, "UDPLITE: inuse %d\n", sock_prot_inuse_get(&udplite_prot));
64 #endif
65         seq_printf(seq, "RAW: inuse %d\n", sock_prot_inuse_get(&raw_prot));
66         seq_printf(seq,  "FRAG: inuse %d memory %d\n",
67                         ip_frag_nqueues(&init_net), ip_frag_mem(&init_net));
68         return 0;
69 }
70
71 static int sockstat_seq_open(struct inode *inode, struct file *file)
72 {
73         return single_open(file, sockstat_seq_show, NULL);
74 }
75
76 static const struct file_operations sockstat_seq_fops = {
77         .owner   = THIS_MODULE,
78         .open    = sockstat_seq_open,
79         .read    = seq_read,
80         .llseek  = seq_lseek,
81         .release = single_release,
82 };
83
84 /* snmp items */
85 static const struct snmp_mib snmp4_ipstats_list[] = {
86         SNMP_MIB_ITEM("InReceives", IPSTATS_MIB_INRECEIVES),
87         SNMP_MIB_ITEM("InHdrErrors", IPSTATS_MIB_INHDRERRORS),
88         SNMP_MIB_ITEM("InAddrErrors", IPSTATS_MIB_INADDRERRORS),
89         SNMP_MIB_ITEM("ForwDatagrams", IPSTATS_MIB_OUTFORWDATAGRAMS),
90         SNMP_MIB_ITEM("InUnknownProtos", IPSTATS_MIB_INUNKNOWNPROTOS),
91         SNMP_MIB_ITEM("InDiscards", IPSTATS_MIB_INDISCARDS),
92         SNMP_MIB_ITEM("InDelivers", IPSTATS_MIB_INDELIVERS),
93         SNMP_MIB_ITEM("OutRequests", IPSTATS_MIB_OUTREQUESTS),
94         SNMP_MIB_ITEM("OutDiscards", IPSTATS_MIB_OUTDISCARDS),
95         SNMP_MIB_ITEM("OutNoRoutes", IPSTATS_MIB_OUTNOROUTES),
96         SNMP_MIB_ITEM("ReasmTimeout", IPSTATS_MIB_REASMTIMEOUT),
97         SNMP_MIB_ITEM("ReasmReqds", IPSTATS_MIB_REASMREQDS),
98         SNMP_MIB_ITEM("ReasmOKs", IPSTATS_MIB_REASMOKS),
99         SNMP_MIB_ITEM("ReasmFails", IPSTATS_MIB_REASMFAILS),
100         SNMP_MIB_ITEM("FragOKs", IPSTATS_MIB_FRAGOKS),
101         SNMP_MIB_ITEM("FragFails", IPSTATS_MIB_FRAGFAILS),
102         SNMP_MIB_ITEM("FragCreates", IPSTATS_MIB_FRAGCREATES),
103         SNMP_MIB_SENTINEL
104 };
105
106 /* Following RFC4293 items are displayed in /proc/net/netstat */
107 static const struct snmp_mib snmp4_ipextstats_list[] = {
108         SNMP_MIB_ITEM("InNoRoutes", IPSTATS_MIB_INNOROUTES),
109         SNMP_MIB_ITEM("InTruncatedPkts", IPSTATS_MIB_INTRUNCATEDPKTS),
110         SNMP_MIB_ITEM("InMcastPkts", IPSTATS_MIB_INMCASTPKTS),
111         SNMP_MIB_ITEM("OutMcastPkts", IPSTATS_MIB_OUTMCASTPKTS),
112         SNMP_MIB_ITEM("InBcastPkts", IPSTATS_MIB_INBCASTPKTS),
113         SNMP_MIB_ITEM("OutBcastPkts", IPSTATS_MIB_OUTBCASTPKTS),
114         SNMP_MIB_SENTINEL
115 };
116
117 static struct {
118         char *name;
119         int index;
120 } icmpmibmap[] = {
121         { "DestUnreachs", ICMP_DEST_UNREACH },
122         { "TimeExcds", ICMP_TIME_EXCEEDED },
123         { "ParmProbs", ICMP_PARAMETERPROB },
124         { "SrcQuenchs", ICMP_SOURCE_QUENCH },
125         { "Redirects", ICMP_REDIRECT },
126         { "Echos", ICMP_ECHO },
127         { "EchoReps", ICMP_ECHOREPLY },
128         { "Timestamps", ICMP_TIMESTAMP },
129         { "TimestampReps", ICMP_TIMESTAMPREPLY },
130         { "AddrMasks", ICMP_ADDRESS },
131         { "AddrMaskReps", ICMP_ADDRESSREPLY },
132         { NULL, 0 }
133 };
134
135
136 static const struct snmp_mib snmp4_tcp_list[] = {
137         SNMP_MIB_ITEM("RtoAlgorithm", TCP_MIB_RTOALGORITHM),
138         SNMP_MIB_ITEM("RtoMin", TCP_MIB_RTOMIN),
139         SNMP_MIB_ITEM("RtoMax", TCP_MIB_RTOMAX),
140         SNMP_MIB_ITEM("MaxConn", TCP_MIB_MAXCONN),
141         SNMP_MIB_ITEM("ActiveOpens", TCP_MIB_ACTIVEOPENS),
142         SNMP_MIB_ITEM("PassiveOpens", TCP_MIB_PASSIVEOPENS),
143         SNMP_MIB_ITEM("AttemptFails", TCP_MIB_ATTEMPTFAILS),
144         SNMP_MIB_ITEM("EstabResets", TCP_MIB_ESTABRESETS),
145         SNMP_MIB_ITEM("CurrEstab", TCP_MIB_CURRESTAB),
146         SNMP_MIB_ITEM("InSegs", TCP_MIB_INSEGS),
147         SNMP_MIB_ITEM("OutSegs", TCP_MIB_OUTSEGS),
148         SNMP_MIB_ITEM("RetransSegs", TCP_MIB_RETRANSSEGS),
149         SNMP_MIB_ITEM("InErrs", TCP_MIB_INERRS),
150         SNMP_MIB_ITEM("OutRsts", TCP_MIB_OUTRSTS),
151         SNMP_MIB_SENTINEL
152 };
153
154 static const struct snmp_mib snmp4_udp_list[] = {
155         SNMP_MIB_ITEM("InDatagrams", UDP_MIB_INDATAGRAMS),
156         SNMP_MIB_ITEM("NoPorts", UDP_MIB_NOPORTS),
157         SNMP_MIB_ITEM("InErrors", UDP_MIB_INERRORS),
158         SNMP_MIB_ITEM("OutDatagrams", UDP_MIB_OUTDATAGRAMS),
159         SNMP_MIB_ITEM("RcvbufErrors", UDP_MIB_RCVBUFERRORS),
160         SNMP_MIB_ITEM("SndbufErrors", UDP_MIB_SNDBUFERRORS),
161         SNMP_MIB_SENTINEL
162 };
163
164 static const struct snmp_mib snmp4_net_list[] = {
165         SNMP_MIB_ITEM("SyncookiesSent", LINUX_MIB_SYNCOOKIESSENT),
166         SNMP_MIB_ITEM("SyncookiesRecv", LINUX_MIB_SYNCOOKIESRECV),
167         SNMP_MIB_ITEM("SyncookiesFailed", LINUX_MIB_SYNCOOKIESFAILED),
168         SNMP_MIB_ITEM("EmbryonicRsts", LINUX_MIB_EMBRYONICRSTS),
169         SNMP_MIB_ITEM("PruneCalled", LINUX_MIB_PRUNECALLED),
170         SNMP_MIB_ITEM("RcvPruned", LINUX_MIB_RCVPRUNED),
171         SNMP_MIB_ITEM("OfoPruned", LINUX_MIB_OFOPRUNED),
172         SNMP_MIB_ITEM("OutOfWindowIcmps", LINUX_MIB_OUTOFWINDOWICMPS),
173         SNMP_MIB_ITEM("LockDroppedIcmps", LINUX_MIB_LOCKDROPPEDICMPS),
174         SNMP_MIB_ITEM("ArpFilter", LINUX_MIB_ARPFILTER),
175         SNMP_MIB_ITEM("TW", LINUX_MIB_TIMEWAITED),
176         SNMP_MIB_ITEM("TWRecycled", LINUX_MIB_TIMEWAITRECYCLED),
177         SNMP_MIB_ITEM("TWKilled", LINUX_MIB_TIMEWAITKILLED),
178         SNMP_MIB_ITEM("PAWSPassive", LINUX_MIB_PAWSPASSIVEREJECTED),
179         SNMP_MIB_ITEM("PAWSActive", LINUX_MIB_PAWSACTIVEREJECTED),
180         SNMP_MIB_ITEM("PAWSEstab", LINUX_MIB_PAWSESTABREJECTED),
181         SNMP_MIB_ITEM("DelayedACKs", LINUX_MIB_DELAYEDACKS),
182         SNMP_MIB_ITEM("DelayedACKLocked", LINUX_MIB_DELAYEDACKLOCKED),
183         SNMP_MIB_ITEM("DelayedACKLost", LINUX_MIB_DELAYEDACKLOST),
184         SNMP_MIB_ITEM("ListenOverflows", LINUX_MIB_LISTENOVERFLOWS),
185         SNMP_MIB_ITEM("ListenDrops", LINUX_MIB_LISTENDROPS),
186         SNMP_MIB_ITEM("TCPPrequeued", LINUX_MIB_TCPPREQUEUED),
187         SNMP_MIB_ITEM("TCPDirectCopyFromBacklog", LINUX_MIB_TCPDIRECTCOPYFROMBACKLOG),
188         SNMP_MIB_ITEM("TCPDirectCopyFromPrequeue", LINUX_MIB_TCPDIRECTCOPYFROMPREQUEUE),
189         SNMP_MIB_ITEM("TCPPrequeueDropped", LINUX_MIB_TCPPREQUEUEDROPPED),
190         SNMP_MIB_ITEM("TCPHPHits", LINUX_MIB_TCPHPHITS),
191         SNMP_MIB_ITEM("TCPHPHitsToUser", LINUX_MIB_TCPHPHITSTOUSER),
192         SNMP_MIB_ITEM("TCPPureAcks", LINUX_MIB_TCPPUREACKS),
193         SNMP_MIB_ITEM("TCPHPAcks", LINUX_MIB_TCPHPACKS),
194         SNMP_MIB_ITEM("TCPRenoRecovery", LINUX_MIB_TCPRENORECOVERY),
195         SNMP_MIB_ITEM("TCPSackRecovery", LINUX_MIB_TCPSACKRECOVERY),
196         SNMP_MIB_ITEM("TCPSACKReneging", LINUX_MIB_TCPSACKRENEGING),
197         SNMP_MIB_ITEM("TCPFACKReorder", LINUX_MIB_TCPFACKREORDER),
198         SNMP_MIB_ITEM("TCPSACKReorder", LINUX_MIB_TCPSACKREORDER),
199         SNMP_MIB_ITEM("TCPRenoReorder", LINUX_MIB_TCPRENOREORDER),
200         SNMP_MIB_ITEM("TCPTSReorder", LINUX_MIB_TCPTSREORDER),
201         SNMP_MIB_ITEM("TCPFullUndo", LINUX_MIB_TCPFULLUNDO),
202         SNMP_MIB_ITEM("TCPPartialUndo", LINUX_MIB_TCPPARTIALUNDO),
203         SNMP_MIB_ITEM("TCPDSACKUndo", LINUX_MIB_TCPDSACKUNDO),
204         SNMP_MIB_ITEM("TCPLossUndo", LINUX_MIB_TCPLOSSUNDO),
205         SNMP_MIB_ITEM("TCPLoss", LINUX_MIB_TCPLOSS),
206         SNMP_MIB_ITEM("TCPLostRetransmit", LINUX_MIB_TCPLOSTRETRANSMIT),
207         SNMP_MIB_ITEM("TCPRenoFailures", LINUX_MIB_TCPRENOFAILURES),
208         SNMP_MIB_ITEM("TCPSackFailures", LINUX_MIB_TCPSACKFAILURES),
209         SNMP_MIB_ITEM("TCPLossFailures", LINUX_MIB_TCPLOSSFAILURES),
210         SNMP_MIB_ITEM("TCPFastRetrans", LINUX_MIB_TCPFASTRETRANS),
211         SNMP_MIB_ITEM("TCPForwardRetrans", LINUX_MIB_TCPFORWARDRETRANS),
212         SNMP_MIB_ITEM("TCPSlowStartRetrans", LINUX_MIB_TCPSLOWSTARTRETRANS),
213         SNMP_MIB_ITEM("TCPTimeouts", LINUX_MIB_TCPTIMEOUTS),
214         SNMP_MIB_ITEM("TCPRenoRecoveryFail", LINUX_MIB_TCPRENORECOVERYFAIL),
215         SNMP_MIB_ITEM("TCPSackRecoveryFail", LINUX_MIB_TCPSACKRECOVERYFAIL),
216         SNMP_MIB_ITEM("TCPSchedulerFailed", LINUX_MIB_TCPSCHEDULERFAILED),
217         SNMP_MIB_ITEM("TCPRcvCollapsed", LINUX_MIB_TCPRCVCOLLAPSED),
218         SNMP_MIB_ITEM("TCPDSACKOldSent", LINUX_MIB_TCPDSACKOLDSENT),
219         SNMP_MIB_ITEM("TCPDSACKOfoSent", LINUX_MIB_TCPDSACKOFOSENT),
220         SNMP_MIB_ITEM("TCPDSACKRecv", LINUX_MIB_TCPDSACKRECV),
221         SNMP_MIB_ITEM("TCPDSACKOfoRecv", LINUX_MIB_TCPDSACKOFORECV),
222         SNMP_MIB_ITEM("TCPAbortOnSyn", LINUX_MIB_TCPABORTONSYN),
223         SNMP_MIB_ITEM("TCPAbortOnData", LINUX_MIB_TCPABORTONDATA),
224         SNMP_MIB_ITEM("TCPAbortOnClose", LINUX_MIB_TCPABORTONCLOSE),
225         SNMP_MIB_ITEM("TCPAbortOnMemory", LINUX_MIB_TCPABORTONMEMORY),
226         SNMP_MIB_ITEM("TCPAbortOnTimeout", LINUX_MIB_TCPABORTONTIMEOUT),
227         SNMP_MIB_ITEM("TCPAbortOnLinger", LINUX_MIB_TCPABORTONLINGER),
228         SNMP_MIB_ITEM("TCPAbortFailed", LINUX_MIB_TCPABORTFAILED),
229         SNMP_MIB_ITEM("TCPMemoryPressures", LINUX_MIB_TCPMEMORYPRESSURES),
230         SNMP_MIB_ITEM("TCPSACKDiscard", LINUX_MIB_TCPSACKDISCARD),
231         SNMP_MIB_ITEM("TCPDSACKIgnoredOld", LINUX_MIB_TCPDSACKIGNOREDOLD),
232         SNMP_MIB_ITEM("TCPDSACKIgnoredNoUndo", LINUX_MIB_TCPDSACKIGNOREDNOUNDO),
233         SNMP_MIB_ITEM("TCPSpuriousRTOs", LINUX_MIB_TCPSPURIOUSRTOS),
234         SNMP_MIB_SENTINEL
235 };
236
237 static void icmpmsg_put(struct seq_file *seq)
238 {
239 #define PERLINE 16
240
241         int j, i, count;
242         static int out[PERLINE];
243
244         count = 0;
245         for (i = 0; i < ICMPMSG_MIB_MAX; i++) {
246
247                 if (snmp_fold_field((void **) icmpmsg_statistics, i))
248                         out[count++] = i;
249                 if (count < PERLINE)
250                         continue;
251
252                 seq_printf(seq, "\nIcmpMsg:");
253                 for (j = 0; j < PERLINE; ++j)
254                         seq_printf(seq, " %sType%u", i & 0x100 ? "Out" : "In",
255                                         i & 0xff);
256                 seq_printf(seq, "\nIcmpMsg: ");
257                 for (j = 0; j < PERLINE; ++j)
258                         seq_printf(seq, " %lu",
259                                 snmp_fold_field((void **) icmpmsg_statistics,
260                                 out[j]));
261                 seq_putc(seq, '\n');
262         }
263         if (count) {
264                 seq_printf(seq, "\nIcmpMsg:");
265                 for (j = 0; j < count; ++j)
266                         seq_printf(seq, " %sType%u", out[j] & 0x100 ? "Out" :
267                                 "In", out[j] & 0xff);
268                 seq_printf(seq, "\nIcmpMsg:");
269                 for (j = 0; j < count; ++j)
270                         seq_printf(seq, " %lu", snmp_fold_field((void **)
271                                 icmpmsg_statistics, out[j]));
272         }
273
274 #undef PERLINE
275 }
276
277 static void icmp_put(struct seq_file *seq)
278 {
279         int i;
280
281         seq_puts(seq, "\nIcmp: InMsgs InErrors");
282         for (i=0; icmpmibmap[i].name != NULL; i++)
283                 seq_printf(seq, " In%s", icmpmibmap[i].name);
284         seq_printf(seq, " OutMsgs OutErrors");
285         for (i=0; icmpmibmap[i].name != NULL; i++)
286                 seq_printf(seq, " Out%s", icmpmibmap[i].name);
287         seq_printf(seq, "\nIcmp: %lu %lu",
288                 snmp_fold_field((void **) icmp_statistics, ICMP_MIB_INMSGS),
289                 snmp_fold_field((void **) icmp_statistics, ICMP_MIB_INERRORS));
290         for (i=0; icmpmibmap[i].name != NULL; i++)
291                 seq_printf(seq, " %lu",
292                         snmp_fold_field((void **) icmpmsg_statistics,
293                                 icmpmibmap[i].index));
294         seq_printf(seq, " %lu %lu",
295                 snmp_fold_field((void **) icmp_statistics, ICMP_MIB_OUTMSGS),
296                 snmp_fold_field((void **) icmp_statistics, ICMP_MIB_OUTERRORS));
297         for (i=0; icmpmibmap[i].name != NULL; i++)
298                 seq_printf(seq, " %lu",
299                         snmp_fold_field((void **) icmpmsg_statistics,
300                                 icmpmibmap[i].index | 0x100));
301 }
302
303 /*
304  *      Called from the PROCfs module. This outputs /proc/net/snmp.
305  */
306 static int snmp_seq_show(struct seq_file *seq, void *v)
307 {
308         int i;
309
310         seq_puts(seq, "Ip: Forwarding DefaultTTL");
311
312         for (i = 0; snmp4_ipstats_list[i].name != NULL; i++)
313                 seq_printf(seq, " %s", snmp4_ipstats_list[i].name);
314
315         seq_printf(seq, "\nIp: %d %d",
316                    IPV4_DEVCONF_ALL(&init_net, FORWARDING) ? 1 : 2,
317                    sysctl_ip_default_ttl);
318
319         for (i = 0; snmp4_ipstats_list[i].name != NULL; i++)
320                 seq_printf(seq, " %lu",
321                            snmp_fold_field((void **)ip_statistics,
322                                            snmp4_ipstats_list[i].entry));
323
324         icmp_put(seq);  /* RFC 2011 compatibility */
325         icmpmsg_put(seq);
326
327         seq_puts(seq, "\nTcp:");
328         for (i = 0; snmp4_tcp_list[i].name != NULL; i++)
329                 seq_printf(seq, " %s", snmp4_tcp_list[i].name);
330
331         seq_puts(seq, "\nTcp:");
332         for (i = 0; snmp4_tcp_list[i].name != NULL; i++) {
333                 /* MaxConn field is signed, RFC 2012 */
334                 if (snmp4_tcp_list[i].entry == TCP_MIB_MAXCONN)
335                         seq_printf(seq, " %ld",
336                                    snmp_fold_field((void **)tcp_statistics,
337                                                    snmp4_tcp_list[i].entry));
338                 else
339                         seq_printf(seq, " %lu",
340                                    snmp_fold_field((void **)tcp_statistics,
341                                                    snmp4_tcp_list[i].entry));
342         }
343
344         seq_puts(seq, "\nUdp:");
345         for (i = 0; snmp4_udp_list[i].name != NULL; i++)
346                 seq_printf(seq, " %s", snmp4_udp_list[i].name);
347
348         seq_puts(seq, "\nUdp:");
349         for (i = 0; snmp4_udp_list[i].name != NULL; i++)
350                 seq_printf(seq, " %lu",
351                            snmp_fold_field((void **)udp_statistics,
352                                            snmp4_udp_list[i].entry));
353
354 #ifdef CONFIG_IP_UDPLITE
355         /* the UDP and UDP-Lite MIBs are the same */
356         seq_puts(seq, "\nUdpLite:");
357         for (i = 0; snmp4_udp_list[i].name != NULL; i++)
358                 seq_printf(seq, " %s", snmp4_udp_list[i].name);
359
360         seq_puts(seq, "\nUdpLite:");
361         for (i = 0; snmp4_udp_list[i].name != NULL; i++)
362                 seq_printf(seq, " %lu",
363                            snmp_fold_field((void **)udplite_statistics,
364                                            snmp4_udp_list[i].entry));
365 #endif
366         seq_putc(seq, '\n');
367         return 0;
368 }
369
370 static int snmp_seq_open(struct inode *inode, struct file *file)
371 {
372         return single_open(file, snmp_seq_show, NULL);
373 }
374
375 static const struct file_operations snmp_seq_fops = {
376         .owner   = THIS_MODULE,
377         .open    = snmp_seq_open,
378         .read    = seq_read,
379         .llseek  = seq_lseek,
380         .release = single_release,
381 };
382
383
384
385 /*
386  *      Output /proc/net/netstat
387  */
388 static int netstat_seq_show(struct seq_file *seq, void *v)
389 {
390         int i;
391
392         seq_puts(seq, "TcpExt:");
393         for (i = 0; snmp4_net_list[i].name != NULL; i++)
394                 seq_printf(seq, " %s", snmp4_net_list[i].name);
395
396         seq_puts(seq, "\nTcpExt:");
397         for (i = 0; snmp4_net_list[i].name != NULL; i++)
398                 seq_printf(seq, " %lu",
399                            snmp_fold_field((void **)net_statistics,
400                                            snmp4_net_list[i].entry));
401
402         seq_puts(seq, "\nIpExt:");
403         for (i = 0; snmp4_ipextstats_list[i].name != NULL; i++)
404                 seq_printf(seq, " %s", snmp4_ipextstats_list[i].name);
405
406         seq_puts(seq, "\nIpExt:");
407         for (i = 0; snmp4_ipextstats_list[i].name != NULL; i++)
408                 seq_printf(seq, " %lu",
409                            snmp_fold_field((void **)ip_statistics,
410                                            snmp4_ipextstats_list[i].entry));
411
412         seq_putc(seq, '\n');
413         return 0;
414 }
415
416 static int netstat_seq_open(struct inode *inode, struct file *file)
417 {
418         return single_open(file, netstat_seq_show, NULL);
419 }
420
421 static const struct file_operations netstat_seq_fops = {
422         .owner   = THIS_MODULE,
423         .open    = netstat_seq_open,
424         .read    = seq_read,
425         .llseek  = seq_lseek,
426         .release = single_release,
427 };
428
429 int __init ip_misc_proc_init(void)
430 {
431         int rc = 0;
432
433         if (!proc_net_fops_create(&init_net, "netstat", S_IRUGO, &netstat_seq_fops))
434                 goto out_netstat;
435
436         if (!proc_net_fops_create(&init_net, "snmp", S_IRUGO, &snmp_seq_fops))
437                 goto out_snmp;
438
439         if (!proc_net_fops_create(&init_net, "sockstat", S_IRUGO, &sockstat_seq_fops))
440                 goto out_sockstat;
441 out:
442         return rc;
443 out_sockstat:
444         proc_net_remove(&init_net, "snmp");
445 out_snmp:
446         proc_net_remove(&init_net, "netstat");
447 out_netstat:
448         rc = -ENOMEM;
449         goto out;
450 }
451